Trolley-stand.



Pmmnmv Aug. I3, Iam. E. .1. KELLEY.

TROLLEY STAND. (Application filed nec. 14, 1960.)

(No Model.)

/7 /Z NIH l Il Y i i UNITED STATES PATENT OFFICE.

EDWARD J. KELLEY, OF BALTIMORE,11VIARYLAND, ASSIGNOR TO G. FRED JOHNSON,OF NORFOLK, VIRGINIA.A

TROLLEY-STAND.

SPECIFICATION forming part of Letters Patent No. 680,662, dated August13, 1901. Application liled December 14, 1900f Serial No. 39,886. (Nomodel.)

To c//ZZ whom t may concern.-

Be it known that I, EDWARD J. KELLEY, a citizen of the United States,residing at Baltimore, in the State of Maryland, have invented a newand/useful Trolley-Stand, of which the following is a specification.

This invention relates to trolleys for electric railways, and moreparticularly to the framevfor the trolley-arm by means of which the armis mounted upon the vehicle.

In the usual mounting of the trolley-arm the arm is pivoted in arotatable frame and is provided with opposin g helical sprin gs whichact to hold the arm normally in a vertical position. When thetrolley-wheel is in engagement with the trolley-wire, one set of springsis compressed and the other set is distended, so that when the wheeljumps from the wire the springs formerly distended act as bufferspri'ngsand cushion the shock that would` otherwise tend to tear the frame fromthe roof of the vehicle. When the arm comes to rest, however, it is in avertical position and will then strike the suspension-arms or thesuspension-wires by means of which the trolleywire is hung above thetrack, with the result that these suspending devices will bebroken.

The object of the present invention is to provide a construction offrame which will not only overcome the tendency to fracture the frameand arm when the wheel leaves the wire, but will release the tension ofthe holding springs or spring that maintains the arm in its operativeposition, so that the arm will drop into such lowered position as willprevent it from striking the suspending devices.

The arm will thus not only be prevented from injuring the suspendingdevices, but will be saved from injury by them.

A further object of the invention is to provide a construction which,after the tension has been taken from the sustaining-spring, may bereadily operated to place the spring again under tension to raise andhold the arm yieldably in its operative position.

Additional objects of the invention relate to means for holding thesustaining-spring in proper position and to the pivotal mounting of theframe in the turn-table plate to permit of effective lubrication and tosecure an eficient bearing.

Other objects and advantages of the invention will be evident from thefollowing description.

In the drawings forming a portion of this specification, and in whichlike numerals of reference indicate similar parts in the several views,Figure 1 is a side elevation ofthe device, showing the trolley-arm inraised position. Fig. 2 is a View, partly in section and partly in sideelevation, showing the trolleyarm in reclining position with theknucklebrace broken and indicating in dotted lines the positions of theparts when the brace has been reset by the arm. Fig. 3 is a section online 3 3 of Fig. 1. Fig. 4 is a detail elevation of the slidable collarfor holding the retaining-spring.

As shown in the drawings, the frame of the trolley-arm consists of abase-casting 10, from the lower side of which and adjacent to one end`there depends a spindle 11, which is rotatably mounted in the socket12, formed upon and projecting upwardly from the turn-table plate13,whic h is bolted fast to the roof of the car. Vhile thebase-casting'lO has a shoulder 14 at the upper end of the spindle, thisshoulder does not rest upon the upper end of the socket to form asupporting-bearing, as is usual, but instead is held spaced slightlyabove the end of the socket by reason of the lower end of the spindleresting upon a plug l5 in the bottom of the socket, this plug being ofBabbitt or other antifriction metal. By thus plugging the lower end ofthe socket the socketis made to contain a lubricant in such quantity asnot to require frequent application. To prevent accidental displacementof the spindle from the socket, the spindle has a circumferential groove16 near its lower end and with which is engaged a set-screw 17, passedinwardly through a threaded perforation in the side of the socket.

The base-plate 10 has upwardly-projecting end portions 1S and 19,through which are formed alining openings, and with these openings isengaged a preferably tubular spring-carrying bar 20, at one end 0f whichis fixed a collar 21,-for apurpose to be presently explained, whileupon. the opposite screw -threaded end there is engaged a nut IOC 22,which bears against the portion 18 and may be adjusted to draw the bar2O through the openings in the portions 18 and 19 to cause the collar totightly impinge against the portion 19, and thus hold the barsecurely inplace. A yoke-shaped casting 23 is disposed withits legs 24 and 25straddling the bar 2O and with the ends thereof pivotally mounted upon apin 26, which is passed transversely through the casting 10, adjacent tothe spindle 11 thereof. The trolley-arm 27 is connected with thisyoke-shaped casting through the medium of `a foot-casting 28, which isalso yoke-shaped, as shown, and which is disposed with the legs 29 and30 thereof against the outer faces of the legs 24 and 25, respectively,of the casting 23. The pipe which forms the trolley-arm proper issecured in a socket or groove in the stem of the foot-casting by meansof clips 3l, as shown.

The legs 29 and 30 of the foot-casting are pivoted to the legs of thecasting23 by means of a pivot-pin 33,which is passed transverselythrough said legs at points between the ends of the legs and in thelower portions of the legs 29 and 30, which lower portions lie at near aright angle to the upper portions, so that when the trolley-arm is inits lowered position the lower ends of the legs 29 and 30 may standvertical. It will be noted that the direction of projection of the lowerportions of the legs 29 and 30 from the upper portions thereof is suchthat if the lower ends of said legs be moved in the direction of theupwardly-directed portion 19 the trolley-arm will be moved toward thevertical position, and, conversely, if the trolley-arm be moved toward ahorizontal position in the direction of the portion 19 the lower ends ofthe legs will move away from the said portion 19.

To hold the lower ends of the legs 29 and 30 yieldablyin the directionof the portion 19 and with the trolley-arm raised, a collar 35 isslidably mounted upon the bar 2O adjacent to the portion 19, and hasperforated ears 36 and 37 at diametrically opposite points thereof, andwith these ears are engaged tie-rods 38 and 39, provided withadjusting-nuts 40 to rest against theears, while at the opposite ends ofthe rods are formed hooks 41 and 42, which are engaged with perforationsin the lower ends of the legs 29 and 30. The collar 35 has an annularseat in its face adjacent to the casting 23, and in this seat isdisposed one end of a helical spring 43, which is disposed encirclingthe bar 20 and which rests with its opposite end against anadjusting-nut 44, which is engaged with the threads at the opposite endof the bar 20. This spring, as will be readily seen, tends to hold thecollar 35 against the upturned end 19 of the casting 10 to hold thetrolley-arm elevated, with the wheel thereof in position forengagementwith the trolley-wire. This tendency of the spring would of course drawthe casting 23 in the same direction as the lower ends of fthe legs 29and 30, and to prevent this movement of the casting 23 under normalconditions the knuckle-brace 45 is employed. The knucklebrace includesthe two members 46 and 47, of which the member 46 is pivoted betweenears 48 upon the collar 2l, while the member 47 is mounted pivotallyupon the pivot-pin 33 and has an upwardly-projecting end 49 projectingbeyond said pin and lying between the legs of the casting 23 forengagement by the trip-lug 50, formed by continuing the stem of thecasting 28 inwardly between the legs 29 and 30 thereof, this engagementof the triplug being effected when the trolley-arm rises under theinfiuence of its retaining-spring beyond the position assumed whenengaged with the trolley-wire. This engagement of the trippinglug willof course move the member 47 pivotally to break the knucklejoint betweenit and the member 46 Inasmuch as the knuckle-brace prevents pivotalmovement of the casting 23 under normal positions the strain exerted onthe brace by the spring is such that when the brace is once broken to aslight degree said spring acts to break it further, permitting thecasting 23 to move pivotally and the foot-casting 28 to move bodily inthe direction of the portion 19 of the casting 10, with the result thatthe collar 35 is permitted to move against the portion 19. At the sametime the pivot-pin 33 is carried in the direction of the collar 35 andthe ends of the legs 29 and 30 moving on the hooks of the tie-rods aspivots the trolley-arm is permitted to drop to lowered position.

The casting 23 has an upwardly-directed stem 55, against which issecured a springbumper 56 in the path of upward movement of thetrolley-arm, and this spring-bumper receives the shock of thetrolley-arm after it has effected a breaking of the knuckle-brace andthrows the arm backwardly, so that it will drop by gravity to itslowered position to recline against the inclined member 47 of theknuckle-brace. WVith the trolley-arm in its lowered position and theknuckle-brace broken-that is, with the trolley-arm reclining against themember 47 of the knucklebrace-if the arm be then drawn downwardly to ahorizontal position it will press against the member 47 and will move itinto position to set it by alining it with the member 4b'. When themembers 46 and 47 are thus realined, the casting 23 is of coursepivotally moved to its former position, carrying the foot-casting 28with it and placing the sustainingspring again under tension. Thetrolley-arm being then permitted to rise, it will move into position torengage the trolley-wire. This resetting of the sustainingspring is ofcourse effected by means of the usual trolley-rope. Thus it is notnecessary for any operation other than that which is usual in replacingthe trolley against the wire IOT) IIO

to replace the present trolley, excepting an initial downward pull uponthe rope to realine the members of the knuckle-brace.

l/Vhat is claimed is- 1. A device of the class described comprising atrolley-arm mounted for pivotal and bodily movement, a sustaining-springdisposed to move the arm both pivotally and bodily and means for holdingthe arm nor` 3. A device ofthe class described comprising a trolley-armmounted for pivotal and bodily movement, a sustaining-spring dis-V posedto move the arm both pivotally and bodily and means for holding the armnormally against bodily movement, said means being adapted for movementfrom operative position by pivotalmovement of the arm under theinfluence of said spring and being adapted for movement into operativeposition by pivotal movement of the arm in an opposite direction.

4t. A device of the class described comprising a pivoted arm, aspring-carrying bar having a stop, a collar mounted slidably on the barand having an annular seat concentric with the bar, a helical sprin gdisposed upon the bar and with its ends in the seat and against thebar-stop respectively whereby tilting and binding of the collar will beprevented, and connections between the collar and arm, for holding thearm yieldably against pivotal movement.

5. A device of the class described comprising a base-plate, a supportpivoted on the plate, a trolley-arm pivoted to the support and adaptedfor bodily movement therewith, a retaining-spring connected with the armfor holding it yieldably in operative position, and a breakable supportfor holding the trolley-arm support against pivotal movement under theintluence of said spring.

6. A device of the class described comprising a base-plate, a supportpivoted on the plate, a trolley-arm pivoted on the support and adaptedfor bodily movement therewith, a spring connected with the trolley-armfor holding it yieldablyin operative position and for moving the supportpivotally at times to release the tension of the spring, and a brace forthe pivoted support for holding it against movement,said bracebeingadapted for movement into and out of operative position as the arm ispivotally moved in opposite directions.

7.l A device of the class described comprising a base-plate ay supportpivoted to the plate, a movable brace for holding the support normallyagainst pivotal movement, a trolley-arm pivoted to the support andadapted for bodily movement therewith, a spring connected with thetrolley-arm for holding it normally in operative position, the pull ofthe spring being in opposition to said brace, and means in the path ofpivotal movement of the arm under the intluence of the spring, formoving the brace to inoperative position to release the tension of the'spring.

8. A device of the class described comprising a base-plate, a supportpivoted to the base-plate, an arm pivoted to the support and adapted forbodily movement therewith, a spring connected with the arm for holdingit yieldably in operative position, and a hinged brace for the supportadapted to hold the support against'the tendency ot' said spring toprevent bodily movement of the arm, said support having a projection inthe path of pivotal movement ot the arm under the intluy arm when movedin an opposite direction to move the brace to operative position.

9. A device of the class described comprising a pivoted base-platehaving a spring-supporting bar mounted therein and provided with a stop,a spring upon the bar and resting at one end against the stop, a collarupon the bar against the opposite end of the spring, a support pivotedto the plate, an arm pivoted to the support, connections between the armand collar forholding the arm yieldably in operative position, and aknuckle-brace pivoted to the base-plate and to the pivoted support forholding the support against moveme'nt under the intluence of the springand to hold the spring under tension, said brace having a projection inthe path of movement of the arm under the influence of the spring forengagement by the arm to break the knuckle to release the tension of thespring,- and said arm being adapted to lie upon a member of the bracewhen the spring is released, for moving the brace into operativeposition.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two witnesses.

EDWARD J. KELLEY.

Witnesses:

Guo. H. CHANDLEE, FRANK S. APPLEMAN.

